Thread: Coil Springs to Air Spring Conversion - report

Interesting setup, do you have part no of bags used?

Regarding PSI, the firestone truck springs vs D2 bags are much larger diamater if they are 1t14c style bags, they cant really be compared, im not sure what i would be running in mine but it would be similar 40-60 depending on load but i run a longer bag, for the front in mine i would be closer to 80-100psi running a bag that is similar to a range rover/d2 setup.

I run custom valved ultimate suspension shocks, while they are not the easiest mob to deal with there shocks have done me well, and before you ask i dont know the valving specs of the top of my head but they would have it on record.

I really dont like the top mount from the airbag man setup, you loose a lot of room spacing the bag down so far, but running the shorter bag and piston its probably not an issue -i run the 5in piston and 1t14c-8 bags, its a combination of 2 different airbag setups - how long are the rear shocks compared to standard? i originally had a similar set of mounts from airbag man but it was never going to work for me so i remade them shorter to tuck the back up into the spring perch a little further, while it does touch the bellow on the perch sometimes its never been an issue in the 6 years i have ran this setup and it works well but i still need to go to longer shocks to full use the length of the bag, i also need to make up a custom rear sway bar to take some of the body roll with my 130 out being so top heavy with my fridge mounted high.

I am seriously considering a similar setup to what you have done here in the back of my td5 110 as im sick of he terrible ride from the HD rear springs...